PCL (Printer Command Language) is a standard page description language, which was developed by Hewlett-Packard. Initially, it was used by inkjet printers, but later it evolved to suit other types of printers (matrix, thermal, etc.) Today, PCL is used with HP LaserJet-compatible printers. PCL files contain commands, which describe the graphic layout of the document being printed; then they are directed to HP printers, which decode them. Files are created with the help of a PLC driver.

An ICO format is destined for storing icons in Windows. One such file can store a few icons with different size and colors for each. ICO supports square image 16 - 128 pixels. Today’s ICO version supports PNG and JPEG images integration, though icons are usually stored uncompressed. ICO supports true and high color depth, as well as fixed color palette 2 - 256 tones. The image structure is mostly similar to BMP, except the mast put on the background to implement the full image transparency.